CWNU 1836

0.13 UTI

0.0

C_N

0.15

C_dens

0.25

C_C3

0.12

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 2.3 [pc], 0.8 [pc^-2]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.15 Very loose
C_C3 0.25 Low quality
C_lit 0.12 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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CWNU 1836 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Metal-rich Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for CWNU 1836 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	308.223	33.941	0.344	-3.304	-5.618	-3.129
Hunt & Reffert	2024	308.236	33.943	0.336	-3.244	-5.591	–
Cavallo et al.	2024	308.237	33.939	0.335	–	–	–
Hunt & Reffert	2023	308.236	33.943	0.336	-3.244	-5.591	–
He et al.	2023	308.223	33.93	0.352	-3.299	-5.643	-3.13

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	B_frac	BSS
UCC	99999–	2.67	2.925	0.74	309	0.540	196	–	–
Hunt & Reffert	2024	2.67	2.92	0.74	309	–	196⁽¹⁾	–	–
Cavallo et al.	2024	2.78	2.93	–	102	0.540	–	–	–
Hunt & Reffert	2023	2.67	2.92	0.74	309	–	–	–	–
He et al.	2023	2.45	2.95	–	355	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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